The National Lottery advised the 400,000 players to check their tickets and, if they are the winner, to sign the back of it and call them. They will offer professional advice on what to do next.

Speaking on RTÉ's Morning Ireland, National Lottery CEO Dermot Griffin said: "There's nine countries involved in the EuroMillions and the money has to transfer from each of the individual countries, so it will be next week before they get the money. But I'm sure if they go to their bank manager, they'll be good for a loan in the meantime!"